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The experiment lasted for 30 days,during which production performance,milk composition,serum antioxidant indicators,and rumen fermentation parameters were measured.[Result] Compared with the control group,supplementation with 300 mg/kg and 500 mg/kg of Angelica extract significantly increased average daily feed intake and milk yield （P<0.05）,reduced the feed-to-milk ratio,and significantly improved milk fat rate and milk protein rate while reducing somatic cell count in milk （P<0.05）.Regarding serum antioxidant indicators,activities of superoxide dismutase （SOD）,catalase （CAT）,and glutathione peroxidase （GSH-Px） were significantly increased,and malondialdehyde （MDA） content was significantly decreased in the treatment groups （P<0.05）. In terms of rumen fermentation,the contents of microbial crude protein （MCP）,acetate,and propionate were significantly increased （P<0.05）,while no significant effects were observed on rumen pH or the contents of butyrate and isobutyrate.[Conclusion] Dietary supplementation with 300~500 mg/kg of Angelica extract can effectively improve production performance,milk quality,antioxidant capacity,and rumen function in dairy cows,demonstrating its potential as a functional feed additive., authors=MA Changguo, authorsList=MA Changguo, authorCompany=Leling Agriculture and Rural Affairs Bureau,Leling Shandong 253600, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, 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